import java.util.Calendar;
import java.util.Scanner;

// HJ76 尼科彻斯定理
public class HJ76 {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        while (sc.hasNext()) {
            int num = sc.nextInt();
            double a = Math.pow(num, 3);
            StringBuilder sb = new StringBuilder();
            for (int i = 1; i <= a; i++) {
                if (i % 2 != 0) {
                    double sum = num * i + num * (num - 1);
                    if (sum == a) {
                        int k = i;
                        for (int j = 0; j < num; j++) {
                            sb.append(k).append("+");
                            k = k + 2;
                        }
                    }
                }
            }
            String s = sb.deleteCharAt(sb.length() - 1).toString();
            System.out.println(s);
        }
    }
}

